Sole trimmer



Patented Aug. 11, 1936 NETED STAES 3 Claims.

This invention relates to shoe machinery and more especially to an improved sole trimmer, the primary object of the invention being to provide an improved construction and arrange- 5 ment of cutter which can be easily and quickly secured in position on a shaft and removed therefrom without danger to the operator.

A further object is to provide a trimmer of this character including a cutter having an ar- 10 rangement of inwardly projecting pins which engage the teeth of the guard and properly space the guard relative to the cutter.

In shoe machinery of this character in general use the cutter has been ordinarily secured to the 15 end of the shaft by a headed screw and as this screw is usually at the left-hand of the operator it is more or less an awkward job to remove the same and in doing so the screw driver is liable to slip and injure the hand of the operator.

20 With my invention the cutter can be easily secured or removed and without any such danger to the hand of the operator.

With these and other objects in view, the invention consists in certain novel features of con- 25 struction and combinations and arrangements of parts, all of which will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawing Figure 1 is a view in elevation illustrating my 30 improved sole trimmer;

Fig. 2 is a view in longitudinal section;

Fig. 3 is an edge view or side elevation of the disk which is secured to the cutter;

Fig. 4 is an end view of the cutter with the 35 disk thereon, and

Fig. 5 is an edge view or side elevation of the cutter.

I represents a shaft on which a guard 2 and my improved cutter 3 are mounted. The shaft 40 I is reduced in diameter adjacent its end, as

shown at 4, forming a shoulder 5 and on this reduced portion 4 of" the shaft the guard 2 is free to move longitudinally with a coil spring 6 between the guard 2 and the shoulder 5 normally urging the guard toward the end of the shaft.

The shaft I beyond the reduced portion 4 is provided with a portion 1 which is further reduced in diameter and receives my improved cutter 8 thereon. This reduced portion I is provided with a pin 9 which engages in an L shaped slot I in the sleeve II of the cutter 8 so that the coupling means between the cutter and the shaft constitutes a bayonet joint. Another pin 55 I2 projects from the reduced portion I of the shaft I and limits the forward movement of the guard 2 when the cutter is removed.

Adjacent the outer face of the cutter 8 a disk I3 is secured preferably by means of screws I4. This disk I3 is provided with pins I5 project- 5 ing between the teeth of the cutter 8 and in position to be engaged by the teeth of the guard 2, and the shaft I is provided at its extremity with a central stud I6 which enters an opening II. in the center of the disk I3. Cutters of various sizes are employed from time to time on shoe soles of various thicknesses, and it is necessary to remove one cutter and replace it by another. This operation as performed by my improved mechanism is as fol- 15 lows: When it is desired to remove a cutter the operator grasps the guard 2 with one hand and draws it rearwardly against the pressure of the spring 6 and when thus held the cutter can be easily removed by a partial turning movement in the correct direction and then a longitudinal movement on the shaft causing the pin 9 to ride out of the L shaped groove I0 in the sleeve II. When the guard 2 is released its forward movement will be limited by the pin I 2 so that it cannot escape from the shaft. When the new cutter is placed in position the guard is again drawn rearwardly and the cutter positioned on the reduced end of the shaft with the groove III in alinement with the pin 9 and when said pin is in the groove the cutter is given a partial turn to effectually lock the cutter on the shaft. The guard 2 is then permitted to move forwardly and its forward movement is limited by the engagement of the teeth of said guard with the pins I5 which properly space the guard relative to the cutter, but the guard is permitted a yielding movement relative to the cutter to compensate for any inequalities or variations in the thickness of the sole being trimmed.

While I have illustrated and described what I believe to be a preferred embodiment of my invention, it is obvious that various changes might be made in the general form and arrangement of parts without departing from my invention, and hence I do not limit myself to the precise details set forth but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim: 1. A device of the character described including a shaft, a spring-pressed guard on the shaft, a removable cutter coupled to the shaft by a bayonet joint, and pins between the teeth of the 5 cutter engaging the teeth of the guard to properly space the latter relative to the cutter.

2. A device of the character described including a shaft, a spring-pressed guard on the shaft, a pin on the shaft limiting the outward movement of the guard, a cutter removably positioned on the shaft and secured thereon by a pin-and-slot connection, a disk secured to the cutter, and a pin on the disk projecting between the teeth of the cutter and engaging a tooth of the guard to properly space the latter.

3. A device of the character described including a shaft reduced in diameter adjacent one end, a guard mounted to slide on the reduced end of the shaft, a coil spring on the reduced end of the shaft engaging the guard and exerting outward pressure thereon, a pin on the shaft limiting the outward movement of the guard, a cutter having a sleeve receiving the shaft and having an L shaped slot therein receiving a pin on the shaft and constituting a bayonet joint, a disk located against the outer end of the cutter securing the disk to the cutter, and pins on the disk projecting between teeth of the cutter and engaging teeth of the guard to properly space the guard relative to the cutter.

WILLIAM K. BILIADES. 

